import matplotlib.pyplot as plt
score =[90,89,54,65,67,45,69,150,96,66,74,75,76,77,87,98,46,98,97,94,95,96,96,93,58,69,96,59,51,55,87,64,87,97,80]
plt.rcParams['font.sans-serif']=['SimHei']
plt.xlabel('分数')
plt.ylabel('学生数量')
plt.title('学生语文成绩分布直方图')
plt.hist(score,bins=range(0,150,10),facecolor='red',edgecolor='black')
plt.show()






import numpy as np
arr1 = np.array([1.1,2.2,3.3])
print('一堆数组arr1：\n',arr1)
arr2 = np.array((-1,-2,-3),dtype='int32')
print('一堆数组arr2：\n',arr2)
arr1111 = np.array((3,-2,2.3),dtype='float32')
print('一堆数组arr111111：\n',arr1111)
arr3 = np.array([[1,2,3],[4,5,6]],dtype='float32')
print('2*3的二维数组arr3：\n',arr3)












import numpy as np
arr1 = np.zeros(2)
print('一维数组arr1：\n',arr1)
arr2 = np.zeros((2,3))
print('二维数组arr2：\n',arr2)
arr3 = np.ones((2,3))*5
print('一维数组arr3：\n',arr3)
arr4 = np.array((3,3))
print('二维数组arr4：\n',arr4)
arr5 = np.empty(4)
print('一堆数组arr4：\n',arr5)
arr6 = np.empty((3,4),dtype='int')
print('二维数组arr6：\n',arr6)
